Doms, Andreas

Marinzek, Zoran

Pedersen, Torben Bach

English

    Aalborg UniversitetMIRABEL - Efficiently managing more renewable energy using explicit demand andsupply flexibilitiesDoms, Andreas; Marinzek, Zoran; Pedersen, Torben BachPublication date:2013Document VersionEarly version, also known as pre-printLink to publication from Aalborg UniversityCitation for published version (APA):Doms, A., Marinzek, Z., & Pedersen, T. B. (2013). MIRABEL - Efficiently managing more renewable energyusing explicit demand and supply flexibilities. Poster presented at World Smart Grid Forum 2013, Berlin,Germany.General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright ownersand it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.            ? Users may download and print one copy of any publication from the public portal for the purpose of private study or research.            ? You may not further distribute the material or use it for any profit-making activity or commercial gain            ? You may freely distribute the URL identifying the publication in the public portal ?Take down policyIf you believe that this document breaches copyright please contact us at vbn@aub.aau.dk providing details, and we will remove access tothe work immediately and investigate your claim.Downloaded from vbn.aau.dk on: December 27, 2020MIRABEL – Efficiently managing more renewable energy using explicit demand and supply flexibilities   Dr., Andreas Doms, SAP AG, Dresden, Germany Dr., Zoran Marinšek, INEA d.o.o., Slovenia Prof. Dr., Torben Bach Pedersen, Aalborg Universitet, Denmark  Abstract  The MIRABEL project has developed a groundbreaking ICT system that fits the future liberalised energy sector and enables the integration of much higher rates of distributed and renewable energy sources (RES) into the electricity grid. This is done using a radical novel approach for active demand (and supply) side management in which electricity con-sumers and producers issue explicit so-called flex-offers indicating their available flexibilities in time and electricity amount. The MIRABEL system processes large amounts of flex-offers in order to balance electricity supply and de-mand in near real-time and thus supports the integration of non-schedulable renewable energy sources much better than earlier approaches.   1 Introduction The energy sector is in transition. Firstly, the liberalisa-tion process forces companies to restructure their value chain in order to increase their market efficiency. Second-ly, in order to reduce CO2 emissions, the use of renewa-ble energy sources is enforced by national and interna-tional regulations. Thirdly, smart metering is being widely adopted and thus consumers become actively involved. 2 Flex-offers The MIRABEL project set out to develop an approach for managing increased penetration of renewable energy sources and to balance supply and demand accordingly. We have tackled this challenge by leveraging the total flexibility in electricity demand and supply, making this flexibility explicit and allowing trading of this flexibility. The flex-offer concept allows parties connected to the grid to provide their demand/supply flexibilities to other relevant parties e.g., their Balance responsible parties (BRPs), in a standardized, yet powerful, way. A simple example flex-offer is “I need 1.5 kwh for my dishwasher over a 2 hour period starting no earlier than 7PM and fin-ishing no later than 6AM,” but flex-offers generalize to capture electric vehicle charging, heatpumps, and all other types of flexible demand (or supply).  The parties acquiring the flexibilities in demand and sup-ply can then pool the flexibility as an additional element in their portfolio and use it to compensate for the intermit-tent generation by renewable sources. The MIRABEL conceptual architecture is seen in Figure 1 and describes the involvement of Prosumers (providers of flexibility) and Balance Responsible Parties (acquirers of flexibility) in a business interaction of: 1) Providing flex-offers, which specify the available flex-ibility in power and time, 2) Acceptance by the BRP of attractive offers, and 3) Assignment, i.e. specification of how the flexibility is to be exercised (e.g. operation schedules), resulting in a better balance between supply and demand, with higher integration of intermittent renewable energy sources.  Figure 1 MIRABEL conceptual architecture The flex-offer life-cycle phases are shown in figure 2. In the negotiation phase, the price for the flexibility is de-termined. The planning phase is iterative and ends with the assignment of the flex-offer. Now, there is an obliga-tion to execute the flex-offer according to the contracted parameters. After the execution, the contracted energy and the negotiated price for each flex-offer is deducted from the invoice amount for the open contracts.   Figure 2 The flex-offer life-cycle phases 3 Technological Impact We identified the following main achievements with po-tential impact on the future energy market: (1) The concept of Flexibility Trading (FT), together with the MIRABEL roles and process model, gives a new look at the role of demand side management in balancing the grid: As opposed to supply side control, the dominant balancing tool so far, the demand side is gaining in im-portance with the increasing dispersed energy production, especially RES. FT enables localized optimization pro-cesses of energy production and consumption at a large numbers of consumers and prosumers. FT gives the BRP – the central role in the electricity mar-ket trading processes - a meaningful tool for communica-tion with its Balance Group (BG) members and enables setting up a coherent business model for operations. The FT concept thus influences both the BRP business models and the technologies used for it: technologies for commu-nication with its BG members should address as many prosumers as possible, e.g., by merging the BRP BG function with mobile communication platforms and ser-vices. FT also gives to BRP a tool to act as service suppli-er to the TSO (and DSO) - using FT as a separate catego-ry of tertiary TSO reserves. We predict further evolution of this communication and its impact on the technology of trading in the energy reserves market. (2) The conceptual approach to flexibility trading and the structure of the developed energy trading process in the BG through acceptance, aggregation, scheduling and assignment of both consumption and production flex-offers while optimizing imbalances and price, achieves three important tasks:  (1) Introduces the trading concept to the consumer level  (2) Enables dealing with large numbers of flex-offers, and (3) Respects the Harmonized market model constraints.  All three are important for the market deployment of our approach, both horizontally (in the Balance Groups) and vertically, to the Market Balance Area, and later also to the Balance Area, after further harmonization of the elec-tricity market. (3) The roles and process model, based on the Harmo-nized Electricity Market model, builds on classifying the processes in the electricity market system into the primary process of energy trading and into joint supportive pro-cesses for operation of the grid, and on observing that the former can be vertically structured following the concept of nested subsystems. This enables scalability: each sub-system has (essentially) the same set of functions, and the MIRABEL solution can apply to all. Scalability implies usage the levels of a single subsystem, several subsys-tems, and the overall system. This influences both the possibilities for deployment of the solution in vertical lev-els (BG, MBA, and BA) and for standardization of mes-sages in the system.  (4) Flex-offer trading introduces closed contract be-tween issuer of the flex-offer and the BRP. Bringing the concept of a closed contract to the consumer and prosumer level imposes new requirements and roles for the internal energy management system especially for res-idential consumers and prosumers, leading to new func-tions of smart meters:  (1) Measuring in parallel both open contract and closed contract (flex-offers) consumption.  (2) Assuming the function of energy trading subsystem of the internal energy management system of the consumer or prosumer. Scheduling prosumer appliances will be one of the basic functions. Alternatively, a new intelligent energy (trading) interface may evolve on the market as a competing product, espe-cially for prosumers with comprehensive internal energy systems, which might include both RES production and energy storage.  (5) The developed methodologies and solutions of fore-casting, aggregation and scheduling have several im-portant features: (1) Composed multi-level forecasting methodology ena-bles forecasting an energy flow which is the combined result of several forecasts of different energy flows in dif-ferent conditions, e.g. RES production in different geo-graphical areas (weather conditions) etc. (2) Aggregation and de-aggregation algorithms enable processing of a large number of flex-offers for scheduling and enable contracting of individual assigned flex-offers (3) The scheduling algorithms make possible concurrent minimization of energy imbalances and energy price of scheduled flex-offers.   (6) The successful integration of the complete solution and testing it on large number of flex-offers (10.000, 100.000) which has proved the feasibility of the devel-oped technologies will influence other projects in the field of demand side management and may bring the focus of this work closer to the market. In this respect, the pro-posed standardization of flex-offer messages provides one necessary condition for penetration of solutions based on these technologies on the European electricity market.  MIRABEL contributed to the working groups of the Smart Grid Coordination Group that were formed to exe-cute mandate M490. The MIRABEL use case was elabo-rated further and adopted as one of the use cases to con-sider when developing standards related to de-mand/response coordination.  Future work includes using the flex-offer concept to solve (local) grid constraint problems and automatically detect-ing available flexibility at the prosumer level.  Acknowledgment: The MIRABEL project was funded by the EU under the grant agreement number 248195. We acknowledge the contributions of all project members. Further Reading: www.mirabel-project.eu  www.totalflex.dk  The experimentally validated results of MIRABEL can be summarized as follows:  Flexible demand and supply can lead to 7-13% cost reduction for BRPs.  Peak-load reduction by 13-50% and an increase of the base-load in general improve the overall efficien-cy of the system.  Flexible demand and supply improves the integration of renewable energy sources significantly: 70% of the negative impact caused by fluctuating energy supply of renewables like wind can be neutralized given that 15% of the energy consumption will be intelligently controlled by the BRP.   Households can reduce their energy bill by 10-20%.   In combination with energy storages flexible demand and supply can lead to up to 50% reduction of CO2 emissions.     

MIRABEL - Efficiently managing more renewable energy using explicit demand and supply flexibilities

https://vbn.aau.dk/ws/files/160236283/MIRABEL_Efficiently_managing_more_renewable_energy_using_explicit_demand_and_supply_flexibilities.pdf

MIRABEL - Efficiently managing more renewable energy using explicit demand and supply flexibilities

Abstract

Similar works

Full text

Available Versions

VBN